Oil collecting device for center hole of wind power gear box

Abstract

The utility model discloses a wind power gear box center hole oil collecting device. After a gear box runs for a long time, a sealing position of a main shaft of the gear box fails, gear oil seeps from the main shaft and enters a communication cable of a slip ring and an electric slip ring, and the gear oil may corrode the slip ring and a cable sheath. The device comprises a gear box, a communication cable, an electric slip ring and a main shaft, an inner sealing oil guide device is fixed in the main shaft, and the end part of the inner sealing oil guide device is communicated to an oil collecting ring; the inner sealing oil guide device comprises an inner sealing pipe and an annular baffle plate, the inner sealing pipe and the annular baffle plate are respectively welded with the interior of the main shaft, and a sealing gear ring is inserted between the annular baffle plate and the inner sealing pipe. The oil collector is used for oil collection of the center hole of the wind power gear box.

Description

Technical Field

[0001] The utility model relates to a central hole oil collecting device for a wind power gear box. Background Art

[0002] Wind turbines use gearboxes as transmission mechanisms to convert wind energy into kinetic energy, and further into electrical energy. Due to the large overall size of the unit, in order to facilitate transportation and hoisting, and to maintain balance, the gearbox main shaft is often separated from the gearbox for transportation. Since the rotation parameters of the main shaft need to be monitored to achieve variable pitch control, the main shaft needs to be set as a hollow, equipped with communication cables, and cooperated with electric slip rings to achieve monitoring. Considering the above reasons, the gearbox main shaft is often set into two sections, and the multiple sections of the main shaft are spliced into one through the shaft sleeve. A sealing ring is set between the adjacent sections. In actual use, the main shaft is completely immersed in the oil in the gearbox;

[0003] After the gearbox has been running for a long time, the gearbox main shaft seal will fail, causing the gear oil to leak from the main shaft and enter the slip ring and the electric slip ring communication cable. The gear oil may corrode the slip ring and the cable sheath, damage the slip ring, and may also cause communication failure between the slip ring and the pitch control system. Utility Model Content

[0004] The utility model aims to solve the above-mentioned problems and provides a central hole oil collecting device for a wind power gear box.

[0005] The above purpose is achieved through the following technical solutions:

[0006] A wind power gearbox center hole oil collecting device, comprising: a gearbox, a communication cable, an electric slip ring and a main shaft, wherein an inner seal oil guide device is fixed inside the main shaft, and the end of the inner seal oil guide device is connected to the oil collecting ring;

[0007] The inner sealing oil guide device comprises an inner sealing tube and an annular baffle, the inner sealing tube and the annular baffle are respectively welded to the inside of the main shaft, and a sealing gear ring is inserted between the annular baffle and the inner sealing tube.

[0008] In the wind power gearbox center hole oil collecting device, multiple circles of tooth grooves are provided at positions corresponding to the sealing tooth ring on the annular baffle and the inner sealing tube, and a sealing ring is bonded in each of the tooth grooves. Beneficial Effects

[0009] 1. The utility model arranges an inner seal oil guide device in the main shaft. When the seal at the main shaft seal fails, the gear oil can leak into the inner seal oil guide device, then flow into the oil collecting ring, and return to the gear box through the oil return pipe, so as to protect the communication cable and the electric slip ring while reusing the gear oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The appended Figure 1 is a schematic structural view of the present utility model;

[0011] The appended Figure 2 is the front view of the present utility model;

[0012] The appended Figure 3 is the Figure 2 A - A sectional view of the appended

[0013] The appended Figure 4 is the Figure 2 B - B sectional view of the appended

[0014] The appended Figure 5 is the Figure 1 enlarged view of part C of the appended

[0015] The appended Figure 6 is the side view of the sealing tooth ring;

[0016] The appended Figure 7 is the front view of the sealing tooth ring;

[0017] In the figure: 1. Oil collecting ring; 2. Main shaft; 3. Communication cable; 4. Sealing ring; 5. Inner sealing oil guiding device; 6. Electric slip ring; 7. Gearbox; 8. Oil return pipe; 11. Oil inlet hole; 51. Inner sealing pipe; 52. Oil outlet hole; 53. Sealing ring gasket; 54. Sealing tooth ring; 55. Annular baffle; 56. Tooth groove. Specific embodiments Embodiment

[0018] A wind power gearbox central hole oil collecting device, which comprises: a gearbox 7, a communication cable 3, an electric slip ring 6 and a main shaft 2. An inner sealing oil guiding device 5 is fixed inside the main shaft, and the end of the inner sealing oil guiding device communicates with the oil collecting ring 1;

[0019] When the main shaft seal fails, the gear oil will leak into the main shaft through the failure point. The leaked gear oil will enter the inner sealing oil guiding device, which will block the gear oil to prevent it from contacting the communication cable. The gear oil that enters the inner sealing oil guiding device will flow along the inner sealing pipe into the oil collecting ring for collection, and after collection, it will return to the gearbox through the oil return pipe to realize the reuse of the gear oil.

[0020] The inner sealing oil guiding device includes an inner sealing pipe 51 and an annular baffle 55. The inner sealing pipe and the annular baffle are respectively welded to the inside of the main shaft, and a sealing tooth ring 54 is inserted between the annular baffle and the inner sealing pipe.

[0021] Multiple circles of tooth grooves 56 are provided at positions on the annular baffle and the inner sealing pipe corresponding to the sealing tooth ring, and a sealing ring 4 is bonded in each tooth groove.

[0022] The main shaft is divided into two sections. An inner sealing pipe is welded in one section, and an annular baffle is welded in the other section. During installation, the convex teeth of the sealing tooth ring are inserted into the tooth grooves of the annular baffle, and a sealing ring is bonded in each tooth groove. Then, when the main shaft is installed, the tooth grooves of the inner sealing pipe will be embedded into the convex teeth at the other end of the sealing tooth ring, and multiple sections of serpentine seals are formed through the cooperation of the tooth grooves and the convex teeth. A plurality of oil outlet holes 52 are provided on the inner sealing pipe, and the plurality of oil outlet holes are evenly arranged in a circumference. The gear oil leaking from the sealing part will enter the inner sealing oil guiding device, be blocked by the inner sealing oil guiding device, and then be discharged through the oil outlet holes and flow along the oil outlet holes. The end of the main shaft is fixed to the oil collecting ring. The oil collecting ring is sleeved on the inner sealing pipe and welded and fixed. A plurality of oil inlet holes 11 evenly arranged in a circumference are also provided on the oil collecting ring. It enters the oil collecting ring through the oil inlet holes and then returns to the gearbox through the oil return pipe.

Claims

1. An oil collecting device for the central hole of a wind power gearbox, which comprises: Gearbox, communication cable, electric slip ring and main shaft, characterized in that: an inner oil guiding device is fixed inside the main shaft, and the end of the inner oil guiding device communicates with an oil collecting ring; The inner oil guiding device includes an inner sealing pipe and an annular baffle, the inner sealing pipe and the annular baffle are respectively welded to the inside of the main shaft, and a sealing tooth ring is inserted between the annular baffle and the inner sealing pipe.

2. The oil collecting device for the central hole of a wind power gearbox according to claim 1, characterized in that: Multiple circles of tooth grooves are provided at positions on the annular baffle and the inner sealing pipe corresponding to the sealing tooth ring, and a sealing ring is bonded in each tooth groove.

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